370 lines
16 KiB
JavaScript
370 lines
16 KiB
JavaScript
// @remove-on-eject-begin
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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// @remove-on-eject-end
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'use strict';
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const autoprefixer = require('autoprefixer');
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const path = require('path');
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const webpack = require('webpack');
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const HtmlWebpackPlugin = require('html-webpack-plugin');
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const ExtractTextPlugin = require('extract-text-webpack-plugin');
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const ManifestPlugin = require('webpack-manifest-plugin');
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const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
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const SWPrecacheWebpackPlugin = require('sw-precache-webpack-plugin');
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const eslintFormatter = require('react-dev-utils/eslintFormatter');
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const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
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const paths = require('./paths');
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const getClientEnvironment = require('./env');
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// Webpack uses `publicPath` to determine where the app is being served from.
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// It requires a trailing slash, or the file assets will get an incorrect path.
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const publicPath = paths.servedPath;
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// Some apps do not use client-side routing with pushState.
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// For these, "homepage" can be set to "." to enable relative asset paths.
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const shouldUseRelativeAssetPaths = publicPath === './';
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// Source maps are resource heavy and can cause out of memory issue for large source files.
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const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
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// `publicUrl` is just like `publicPath`, but we will provide it to our app
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// as %PUBLIC_URL% in `index.html` and `process.env.PUBLIC_URL` in JavaScript.
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// Omit trailing slash as %PUBLIC_URL%/xyz looks better than %PUBLIC_URL%xyz.
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const publicUrl = publicPath.slice(0, -1);
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// Get environment variables to inject into our app.
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const env = getClientEnvironment(publicUrl);
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// Assert this just to be safe.
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// Development builds of React are slow and not intended for production.
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if (env.stringified['process.env'].NODE_ENV !== '"production"') {
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throw new Error('Production builds must have NODE_ENV=production.');
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}
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// Note: defined here because it will be used more than once.
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const cssFilename = 'static/css/[name].[contenthash:8].css';
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// ExtractTextPlugin expects the build output to be flat.
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// (See https://github.com/webpack-contrib/extract-text-webpack-plugin/issues/27)
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// However, our output is structured with css, js and media folders.
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// To have this structure working with relative paths, we have to use custom options.
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const extractTextPluginOptions = shouldUseRelativeAssetPaths
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? // Making sure that the publicPath goes back to to build folder.
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{ publicPath: Array(cssFilename.split('/').length).join('../') }
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: {};
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// This is the production configuration.
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// It compiles slowly and is focused on producing a fast and minimal bundle.
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// The development configuration is different and lives in a separate file.
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module.exports = {
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// Don't attempt to continue if there are any errors.
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bail: true,
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// We generate sourcemaps in production. This is slow but gives good results.
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// You can exclude the *.map files from the build during deployment.
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devtool: shouldUseSourceMap ? 'source-map' : false,
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// In production, we only want to load the polyfills and the app code.
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entry: [require.resolve('./polyfills'), paths.appIndexJs],
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output: {
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// The build folder.
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path: paths.appBuild,
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// Generated JS file names (with nested folders).
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// There will be one main bundle, and one file per asynchronous chunk.
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// We don't currently advertise code splitting but Webpack supports it.
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filename: 'static/js/[name].[chunkhash:8].js',
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chunkFilename: 'static/js/[name].[chunkhash:8].chunk.js',
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// We inferred the "public path" (such as / or /my-project) from homepage.
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publicPath: publicPath,
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// Point sourcemap entries to original disk location (format as URL on Windows)
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devtoolModuleFilenameTemplate: info =>
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path
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.relative(paths.appSrc, info.absoluteResourcePath)
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.replace(/\\/g, '/'),
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},
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resolve: {
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// This allows you to set a fallback for where Webpack should look for modules.
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// We placed these paths second because we want `node_modules` to "win"
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// if there are any conflicts. This matches Node resolution mechanism.
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// https://github.com/facebookincubator/create-react-app/issues/253
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modules: ['node_modules', paths.appNodeModules].concat(
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// It is guaranteed to exist because we tweak it in `env.js`
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process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
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),
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// These are the reasonable defaults supported by the Node ecosystem.
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// We also include JSX as a common component filename extension to support
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// some tools, although we do not recommend using it, see:
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// https://github.com/facebookincubator/create-react-app/issues/290
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// `web` extension prefixes have been added for better support
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// for React Native Web.
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extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
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alias: {
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// @remove-on-eject-begin
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// Resolve Babel runtime relative to react-scripts.
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// It usually still works on npm 3 without this but it would be
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// unfortunate to rely on, as react-scripts could be symlinked,
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// and thus babel-runtime might not be resolvable from the source.
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'babel-runtime': path.dirname(
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require.resolve('babel-runtime/package.json')
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),
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// @remove-on-eject-end
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// Support React Native Web
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// https://www.smashingmagazine.com/2016/08/a-glimpse-into-the-future-with-react-native-for-web/
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'react-native': 'react-native-web',
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},
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plugins: [
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// Prevents users from importing files from outside of src/ (or node_modules/).
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// This often causes confusion because we only process files within src/ with babel.
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// To fix this, we prevent you from importing files out of src/ -- if you'd like to,
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// please link the files into your node_modules/ and let module-resolution kick in.
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// Make sure your source files are compiled, as they will not be processed in any way.
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new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
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],
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},
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module: {
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strictExportPresence: true,
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rules: [
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// TODO: Disable require.ensure as it's not a standard language feature.
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// We are waiting for https://github.com/facebookincubator/create-react-app/issues/2176.
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// { parser: { requireEnsure: false } },
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// First, run the linter.
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// It's important to do this before Babel processes the JS.
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{
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test: /\.(js|jsx|mjs)$/,
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enforce: 'pre',
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use: [
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{
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options: {
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formatter: eslintFormatter,
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eslintPath: require.resolve('eslint'),
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// @remove-on-eject-begin
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// TODO: consider separate config for production,
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// e.g. to enable no-console and no-debugger only in production.
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baseConfig: {
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extends: [require.resolve('eslint-config-react-app')],
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},
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ignore: false,
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useEslintrc: false,
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// @remove-on-eject-end
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},
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loader: require.resolve('eslint-loader'),
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},
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],
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include: paths.appSrc,
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},
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{
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// "oneOf" will traverse all following loaders until one will
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// match the requirements. When no loader matches it will fall
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// back to the "file" loader at the end of the loader list.
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oneOf: [
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// "url" loader works just like "file" loader but it also embeds
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// assets smaller than specified size as data URLs to avoid requests.
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{
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test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
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loader: require.resolve('url-loader'),
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options: {
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limit: 10000,
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name: 'static/media/[name].[hash:8].[ext]',
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},
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},
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// Process JS with Babel.
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{
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test: /\.(js|jsx|mjs)$/,
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include: paths.appSrc,
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loader: require.resolve('babel-loader'),
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options: {
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// @remove-on-eject-begin
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babelrc: false,
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presets: [require.resolve('babel-preset-react-app')],
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// @remove-on-eject-end
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compact: true,
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},
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},
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// The notation here is somewhat confusing.
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// "postcss" loader applies autoprefixer to our CSS.
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// "css" loader resolves paths in CSS and adds assets as dependencies.
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// "style" loader normally turns CSS into JS modules injecting <style>,
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// but unlike in development configuration, we do something different.
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// `ExtractTextPlugin` first applies the "postcss" and "css" loaders
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// (second argument), then grabs the result CSS and puts it into a
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// separate file in our build process. This way we actually ship
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// a single CSS file in production instead of JS code injecting <style>
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// tags. If you use code splitting, however, any async bundles will still
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// use the "style" loader inside the async code so CSS from them won't be
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// in the main CSS file.
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{
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test: /\.css$/,
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loader: ExtractTextPlugin.extract(
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Object.assign(
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{
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fallback: {
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loader: require.resolve('style-loader'),
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options: {
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hmr: false,
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},
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},
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use: [
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{
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loader: require.resolve('css-loader'),
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options: {
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importLoaders: 1,
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minimize: true,
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sourceMap: shouldUseSourceMap,
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},
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},
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{
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loader: require.resolve('postcss-loader'),
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options: {
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// Necessary for external CSS imports to work
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// https://github.com/facebookincubator/create-react-app/issues/2677
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ident: 'postcss',
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plugins: () => [
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require('postcss-flexbugs-fixes'),
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autoprefixer({
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browsers: [
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'>1%',
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'last 4 versions',
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'Firefox ESR',
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'not ie < 9', // React doesn't support IE8 anyway
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],
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flexbox: 'no-2009',
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}),
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],
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},
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},
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],
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},
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extractTextPluginOptions
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)
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),
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// Note: this won't work without `new ExtractTextPlugin()` in `plugins`.
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},
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// "file" loader makes sure assets end up in the `build` folder.
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// When you `import` an asset, you get its filename.
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// This loader doesn't use a "test" so it will catch all modules
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// that fall through the other loaders.
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{
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loader: require.resolve('file-loader'),
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// Exclude `js` files to keep "css" loader working as it injects
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// it's runtime that would otherwise processed through "file" loader.
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// Also exclude `html` and `json` extensions so they get processed
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// by webpacks internal loaders.
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exclude: [/\.js$/, /\.html$/, /\.json$/],
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options: {
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name: 'static/media/[name].[hash:8].[ext]',
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},
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},
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// ** STOP ** Are you adding a new loader?
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// Make sure to add the new loader(s) before the "file" loader.
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],
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},
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],
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},
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plugins: [
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// Makes some environment variables available in index.html.
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// The public URL is available as %PUBLIC_URL% in index.html, e.g.:
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// <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
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// In production, it will be an empty string unless you specify "homepage"
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// in `package.json`, in which case it will be the pathname of that URL.
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new InterpolateHtmlPlugin(env.raw),
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// Generates an `index.html` file with the <script> injected.
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new HtmlWebpackPlugin({
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inject: true,
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template: paths.appHtml,
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minify: {
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removeComments: true,
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collapseWhitespace: true,
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removeRedundantAttributes: true,
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useShortDoctype: true,
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removeEmptyAttributes: true,
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removeStyleLinkTypeAttributes: true,
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keepClosingSlash: true,
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minifyJS: true,
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minifyCSS: true,
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minifyURLs: true,
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},
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}),
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// Makes some environment variables available to the JS code, for example:
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// if (process.env.NODE_ENV === 'production') { ... }. See `./env.js`.
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// It is absolutely essential that NODE_ENV was set to production here.
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// Otherwise React will be compiled in the very slow development mode.
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new webpack.DefinePlugin(env.stringified),
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// Minify the code.
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new webpack.optimize.UglifyJsPlugin({
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compress: {
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warnings: false,
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// Disabled because of an issue with Uglify breaking seemingly valid code:
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// https://github.com/facebookincubator/create-react-app/issues/2376
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// Pending further investigation:
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// https://github.com/mishoo/UglifyJS2/issues/2011
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comparisons: false,
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},
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mangle: {
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safari10: true,
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},
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output: {
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comments: false,
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// Turned on because emoji and regex is not minified properly using default
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// https://github.com/facebookincubator/create-react-app/issues/2488
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ascii_only: true,
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},
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sourceMap: shouldUseSourceMap,
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}),
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// Note: this won't work without ExtractTextPlugin.extract(..) in `loaders`.
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new ExtractTextPlugin({
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filename: cssFilename,
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}),
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// Generate a manifest file which contains a mapping of all asset filenames
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// to their corresponding output file so that tools can pick it up without
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// having to parse `index.html`.
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new ManifestPlugin({
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fileName: 'asset-manifest.json',
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}),
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// Generate a service worker script that will precache, and keep up to date,
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// the HTML & assets that are part of the Webpack build.
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new SWPrecacheWebpackPlugin({
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// By default, a cache-busting query parameter is appended to requests
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// used to populate the caches, to ensure the responses are fresh.
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// If a URL is already hashed by Webpack, then there is no concern
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// about it being stale, and the cache-busting can be skipped.
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dontCacheBustUrlsMatching: /\.\w{8}\./,
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filename: 'service-worker.js',
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logger(message) {
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if (message.indexOf('Total precache size is') === 0) {
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// This message occurs for every build and is a bit too noisy.
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return;
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}
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if (message.indexOf('Skipping static resource') === 0) {
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// This message obscures real errors so we ignore it.
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// https://github.com/facebookincubator/create-react-app/issues/2612
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return;
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}
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console.log(message);
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},
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minify: true,
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// For unknown URLs, fallback to the index page
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navigateFallback: publicUrl + '/index.html',
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// Ignores URLs starting from /__ (useful for Firebase):
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// https://github.com/facebookincubator/create-react-app/issues/2237#issuecomment-302693219
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navigateFallbackWhitelist: [/^(?!\/__).*/],
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// Don't precache sourcemaps (they're large) and build asset manifest:
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staticFileGlobsIgnorePatterns: [/\.map$/, /asset-manifest\.json$/],
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}),
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// Moment.js is an extremely popular library that bundles large locale files
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// by default due to how Webpack interprets its code. This is a practical
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// solution that requires the user to opt into importing specific locales.
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// https://github.com/jmblog/how-to-optimize-momentjs-with-webpack
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// You can remove this if you don't use Moment.js:
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new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),
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],
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// Some libraries import Node modules but don't use them in the browser.
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// Tell Webpack to provide empty mocks for them so importing them works.
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node: {
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dgram: 'empty',
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fs: 'empty',
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net: 'empty',
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tls: 'empty',
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child_process: 'empty',
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},
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};
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